1 /* DWARF 2 location expression support for GDB.
3 Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #if !defined (DWARF2LOC_H)
24 struct symbol_computed_ops;
26 struct dwarf2_per_cu_data;
27 struct dwarf2_loclist_baton;
29 /* This header is private to the DWARF-2 reader. It is shared between
30 dwarf2read.c and dwarf2loc.c. */
32 /* Return the OBJFILE associated with the compilation unit CU. If CU
33 came from a separate debuginfo file, then the master objfile is
35 struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu);
37 /* Return the address size given in the compilation unit header for CU. */
38 CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu);
40 /* Return the offset size given in the compilation unit header for CU. */
41 int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu);
43 /* Return the text offset of the CU. The returned offset comes from
44 this CU's objfile. If this objfile came from a separate debuginfo
45 file, then the offset may be different from the corresponding
46 offset in the parent objfile. */
47 CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu);
49 /* Find a particular location expression from a location list. */
50 const gdb_byte *dwarf2_find_location_expression
51 (struct dwarf2_loclist_baton *baton,
52 size_t *locexpr_length,
55 struct dwarf2_locexpr_baton dwarf2_fetch_die_location_block
56 (unsigned int offset, struct dwarf2_per_cu_data *per_cu,
57 CORE_ADDR (*get_frame_pc) (void *baton),
60 /* Evaluate a location description, starting at DATA and with length
61 SIZE, to find the current location of variable of TYPE in the context
64 struct value *dwarf2_evaluate_loc_desc (struct type *type,
65 struct frame_info *frame,
68 struct dwarf2_per_cu_data *per_cu);
70 /* The symbol location baton types used by the DWARF-2 reader (i.e.
71 SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol). "struct
72 dwarf2_locexpr_baton" is for a symbol with a single location
73 expression; "struct dwarf2_loclist_baton" is for a symbol with a
76 struct dwarf2_locexpr_baton
78 /* Pointer to the start of the location expression. */
81 /* Length of the location expression. */
84 /* The compilation unit containing the symbol whose location
86 struct dwarf2_per_cu_data *per_cu;
89 struct dwarf2_loclist_baton
91 /* The initial base address for the location list, based on the compilation
93 CORE_ADDR base_address;
95 /* Pointer to the start of the location list. */
98 /* Length of the location list. */
101 /* The compilation unit containing the symbol whose location
103 struct dwarf2_per_cu_data *per_cu;
106 extern const struct symbol_computed_ops dwarf2_locexpr_funcs;
107 extern const struct symbol_computed_ops dwarf2_loclist_funcs;
109 #endif /* dwarf2loc.h */